2 * Connection of captive-vfs interface through CORBA/ORBit
3 * Copyright (C) 2002 Jan Kratochvil <project-captive@jankratochvil.net>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; exactly version 2 of June 1991 is required
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "split.h" /* self */
24 #include "server-GLogFunc.h"
25 #include "captive/macros.h"
26 #include <glib/gmacros.h>
28 #include "captive/rtl-file.h"
31 #include <linc/linc.h> /* for linc_main_get_loop() */
32 #include "server-Directory.h"
33 #include "server-Vfs.h"
34 #include "../client/vfs.h"
35 #include "parent-Vfs.h"
37 #include "server-CaptiveIOChannel.h"
39 #include "../client/giochannel-blind.h" /* for captive_giochannel_blind_new() */
45 #define HEARTBEAT_SOURCE_CHECK_EVENTS (G_IO_IN|G_IO_PRI)
46 #define HEARTBEAT_SOURCE_CHECK_REVENTS (HEARTBEAT_SOURCE_CHECK_EVENTS|G_IO_ERR|G_IO_HUP|G_IO_NVAL)
49 gboolean validate_CORBA_Environment(CORBA_Environment *evp)
51 if (evp->_major==CORBA_NO_EXCEPTION)
54 g_error(_("CORBA Exception occured: id=\"%s\", value=%p"),
55 CORBA_exception_id(evp),CORBA_exception_value(evp));
56 CORBA_exception_free(evp);
60 CORBA_Environment captive_corba_ev;
61 CORBA_ORB captive_corba_orb;
62 PortableServer_POA captive_corba_poa;
64 static void corba_shutdown_atexit(void);
66 static gboolean corba_init(const char *pname,CORBA_Environment *evp,CORBA_ORB *orbp,PortableServer_POA *poap)
68 static gboolean done=FALSE;
71 (gchar *)captive_strdup_alloca(pname),
74 g_return_val_if_fail(evp!=NULL,FALSE);
75 g_return_val_if_fail(orbp!=NULL,FALSE);
76 g_return_val_if_fail(poap!=NULL,FALSE);
79 return TRUE; /* FIXME: '*poap' is left invalid! */
82 CORBA_exception_init(evp);
85 *orbp=CORBA_ORB_init(&orb_argc,orb_argv,"orbit-local-orb",evp);
86 g_return_val_if_fail(*orbp!=CORBA_OBJECT_NIL,FALSE);
87 g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
90 *poap=(PortableServer_POA)CORBA_ORB_resolve_initial_references(*orbp,"RootPOA",evp);
91 g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
93 PortableServer_POAManager poa_mgr;
94 poa_mgr=PortableServer_POA__get_the_POAManager(*poap,evp);
95 g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
96 PortableServer_POAManager_activate(poa_mgr,evp);
97 g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
98 CORBA_Object_release((CORBA_Object)poa_mgr,evp);
99 g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
102 g_atexit(corba_shutdown_atexit);
109 static CORBA_ORB heartbeat_source_callback_orb=CORBA_OBJECT_NIL;
111 gboolean corba_shutdown(CORBA_Environment *evp,CORBA_ORB *orbp,PortableServer_POA *poap)
113 PortableServer_POA poa;
116 g_return_val_if_fail(evp!=NULL,FALSE);
117 g_return_val_if_fail(orbp!=NULL,FALSE);
118 g_return_val_if_fail(poap!=NULL,FALSE);
122 *poap=CORBA_OBJECT_NIL;
123 CORBA_Object_release((CORBA_Object)poa,evp);
124 g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
128 *orbp=CORBA_OBJECT_NIL;
129 heartbeat_source_callback_orb=CORBA_OBJECT_NIL;
130 CORBA_ORB_destroy(orb,evp);
131 /* Do not: g_return_val_if_fail(validate_CORBA_Environment(evp),FALSE);
132 * here as CORBA_ORB_destroy() sometimes reports:
133 * WARNING **: ORB: a total of X refs to X ORB objects were leaked
135 CORBA_exception_free(evp);
138 CORBA_exception_free(evp);
143 static void sandbox_parent_own_orbit_dir_cleanup_atexit(void);
145 static void corba_shutdown_atexit(void)
149 errbool=corba_shutdown(&captive_corba_ev,&captive_corba_orb,&captive_corba_poa);
150 g_assert(errbool==TRUE);
152 /* Delete the CORBA ORB socket directory only after full CORBA ORB shutdown. */
153 sandbox_parent_own_orbit_dir_cleanup_atexit();
157 static GSource *captive_corba_sandbox_child_heartbeat_gsource;
159 #if 0 /* Currently unused - see server-Vfs.c:impl_Captive_Vfs_shutdown() */
160 void sandbox_child_prepare_shutdown(void)
162 /* Prevent during shutdown: Captive-WARNING **: CORBA Exception occured: id="IDL:omg.org/CORBA/COMM_FAILURE:1.0" */
163 if (captive_corba_sandbox_child_heartbeat_gsource) {
164 g_source_destroy(captive_corba_sandbox_child_heartbeat_gsource);
165 g_source_unref(captive_corba_sandbox_child_heartbeat_gsource);
166 captive_corba_sandbox_child_heartbeat_gsource=NULL;
172 void sandbox_child_shutdown(void)
174 /* Do not fail by passing logging messages to the master. */
175 impl_Captive_Vfs_init_g_log_func_disable();
177 g_main_loop_quit(linc_main_get_loop());
181 static gboolean heartbeat_source_callback(gpointer data /* unused */)
183 g_return_val_if_fail(heartbeat_source_callback_orb!=CORBA_OBJECT_NIL,FALSE); /* the source should be removed */
185 sandbox_child_shutdown();
187 return FALSE; /* the source should be removed */
191 static gboolean heartbeat_source_prepare(GSource *source,gint *timeout)
198 static GPollFD heartbeat_source_check_gpollfd;
200 static gboolean heartbeat_source_check(GSource *source)
202 return !!(heartbeat_source_check_gpollfd.revents & HEARTBEAT_SOURCE_CHECK_REVENTS);
205 static gboolean heartbeat_source_dispatch(GSource *source,GSourceFunc callback,gpointer user_data)
207 g_assert(callback!=NULL);
208 return (*callback)(user_data);
211 static GSourceFuncs heartbeat_source_watch_funcs={
212 heartbeat_source_prepare,
213 heartbeat_source_check,
214 heartbeat_source_dispatch,
218 void captive_corba_sandbox_child(const gchar *chrooted_orbit_dir)
220 Captive_Vfs Vfs_object;
221 impl_POA_Captive_Vfs *Vfs_servant;
226 /* attach heartbeat_source_callback() to watch for any abnormalities
227 * on our open pipe 'parentheart_fds' and terminate the child if parent dies.
229 captive_corba_sandbox_child_heartbeat_gsource=g_source_new(&heartbeat_source_watch_funcs,sizeof(GSource));
230 g_return_if_fail(captive_corba_sandbox_child_heartbeat_gsource!=NULL);
231 g_source_set_callback(
232 captive_corba_sandbox_child_heartbeat_gsource, /* source */
233 heartbeat_source_callback, /* func */
236 heartbeat_source_check_gpollfd.fd=0 /* STDIN */; /* parentheart_fd_read */
237 heartbeat_source_check_gpollfd.events=HEARTBEAT_SOURCE_CHECK_EVENTS;
238 heartbeat_source_check_gpollfd.revents=0;
239 g_source_add_poll(captive_corba_sandbox_child_heartbeat_gsource,&heartbeat_source_check_gpollfd);
241 errbool=corba_init("captive-sandbox-child",&captive_corba_ev,&captive_corba_orb,&captive_corba_poa);
242 g_return_if_fail(errbool==TRUE);
244 heartbeat_source_callback_orb=captive_corba_orb;
246 /* linc_main_get_loop() makes sense only after corba_init() -> CORBA_ORB_init() */
247 errguint=g_source_attach(
248 captive_corba_sandbox_child_heartbeat_gsource, /* source */
249 g_main_loop_get_context(linc_main_get_loop())); /* context; NULL means 'default context' */
250 g_assert(errguint!=0);
252 /* Init 'Vfs_object' */
253 Vfs_object=impl_Captive_Vfs__create(captive_corba_poa,&captive_corba_ev);
254 g_assert(validate_CORBA_Environment(&captive_corba_ev));
256 /* Pass IOR to our parent.
257 * It will also create the socket needed for 'chrooted_orbit_dir' below
258 * by CORBA_ORB_object_to_string()->ORBit_marshal_object()->IOP_generate_profiles()->ORBit_ORB_start_servers...
262 Vfs_IOR=CORBA_ORB_object_to_string(captive_corba_orb,Vfs_object,&captive_corba_ev);
263 g_assert(validate_CORBA_Environment(&captive_corba_ev));
264 g_assert(Vfs_IOR!=NULL);
265 errint=printf("ior=%s\n",Vfs_IOR);
270 /* Default mode is 0700, permit parent non-"captive" users to access our IOR socket. */
271 if (chrooted_orbit_dir) {
273 struct dirent *dirent;
274 const gchar *socketname=NULL,*socketpathname;
276 errint=chmod(chrooted_orbit_dir,0755);
279 dir=opendir(chrooted_orbit_dir);
281 while (errno=0,(dirent=readdir(dir))) {
282 if (!strcmp(dirent->d_name,".") || !strcmp(dirent->d_name,".."))
284 g_assert(socketname==NULL);
285 socketname=captive_strdup_alloca(dirent->d_name);
288 errint=closedir(dir);
290 g_assert(socketname!=NULL);
292 socketpathname=captive_printf_alloca("%s/%s",chrooted_orbit_dir,socketname);
293 errint=chmod(socketpathname,0666);
296 printf("socketname=%s\n",socketname);
299 /* Close the output to flush it to our spawning parent. */
300 errint=fflush(stdout);
302 errint=fclose(stdout);
305 /* CORBA_ORB_run() -> linc_main_loop_run() -> g_main_loop_run()
306 * and therefore we should be safe with glib events handling.
308 CORBA_ORB_run(captive_corba_orb,&captive_corba_ev);
309 g_assert(validate_CORBA_Environment(&captive_corba_ev));
311 /* Shutdown 'Vfs' servant */
312 Vfs_servant=PortableServer_POA_reference_to_servant(captive_corba_poa,Vfs_object,&captive_corba_ev);
313 g_assert(validate_CORBA_Environment(&captive_corba_ev));
314 CORBA_Object_release(Vfs_object,&captive_corba_ev);
315 g_assert(validate_CORBA_Environment(&captive_corba_ev));
316 impl_Captive_Vfs__destroy(Vfs_servant,&captive_corba_ev);
317 g_assert(validate_CORBA_Environment(&captive_corba_ev));
319 errbool=corba_shutdown(&captive_corba_ev,&captive_corba_orb,&captive_corba_poa);
320 g_assert(errbool==TRUE);
326 static void options_module_captive_to_options_module_corba
327 (Captive_CaptiveOptionsModule *dest_options_module_corba,const struct captive_options_module *src_options_module_captive)
329 g_return_if_fail(dest_options_module_corba!=NULL);
330 g_return_if_fail(src_options_module_captive!=NULL);
332 g_return_if_fail(src_options_module_captive->type==CAPTIVE_OPTIONS_MODULE_TYPE_PE32);
334 dest_options_module_corba->pathname_utf8=CORBA_string_dup(src_options_module_captive->pathname_utf8);
335 dest_options_module_corba->data._maximum=src_options_module_captive->u.pe32.length;
336 dest_options_module_corba->data._length =src_options_module_captive->u.pe32.length;
337 dest_options_module_corba->data._buffer=Captive_Bytes_allocbuf(dest_options_module_corba->data._maximum);
338 memcpy(dest_options_module_corba->data._buffer,src_options_module_captive->u.pe32.base,
339 src_options_module_captive->u.pe32.length);
340 dest_options_module_corba->data._release=TRUE;
343 static void unlink_nonrecursive(const gchar *dirname)
346 struct dirent *dirent;
349 dir=opendir(dirname);
352 while (errno=0,(dirent=readdir(dir))) {
355 if (!strcmp(dirent->d_name,".") || !strcmp(dirent->d_name,".."))
357 pathname=g_strdup_printf("%s/%s",dirname,dirent->d_name);
358 errint=unlink(pathname);
363 errint=closedir(dir);
365 errint=rmdir(dirname);
369 static const gchar *sandbox_parent_own_orbit_dir;
370 static const gchar *sandbox_parent_own_orbit_socket;
372 static void sandbox_parent_own_orbit_dir_cleanup_atexit(void)
374 static gboolean done=FALSE;
376 g_log(G_LOG_DOMAIN,G_LOG_LEVEL_DEBUG,"%s; done=%d",G_STRLOC,(int)done);
382 if (sandbox_parent_own_orbit_dir)
383 unlink_nonrecursive(sandbox_parent_own_orbit_dir);
386 static struct sandbox_parent_own_orbit_dir_cleanup_signal {
388 /* FIXME: Why we cannot use 'sighandler_t'? */ void (*sighandler_orig)(int signum);
389 } sandbox_parent_own_orbit_dir_cleanup_signals[]={
398 static void sandbox_parent_own_orbit_dir_cleanup_sighandler(int signum)
400 struct sandbox_parent_own_orbit_dir_cleanup_signal *sigstructp;
403 sigstructp=sandbox_parent_own_orbit_dir_cleanup_signals;
404 sigstructp<sandbox_parent_own_orbit_dir_cleanup_signals+G_N_ELEMENTS(sandbox_parent_own_orbit_dir_cleanup_signals);
406 if (sigstructp->signum==signum)
409 g_assert(sigstructp<sandbox_parent_own_orbit_dir_cleanup_signals+G_N_ELEMENTS(sandbox_parent_own_orbit_dir_cleanup_signals));
410 signal(signum,sigstructp->sighandler_orig);
412 /* Prevent recursive fatal logging before signal restore: */
413 /* Do not: g_log(G_LOG_DOMAIN,G_LOG_LEVEL_DEBUG,"%s: signum=%d,sighandler_orig=%p",G_STRLOC,signum,sigstructp->sighandler_orig);
414 * as it is dangerous to g_log() from sighandler.
417 sandbox_parent_own_orbit_dir_cleanup_atexit();
419 /* Do not: g_log(G_LOG_DOMAIN,G_LOG_LEVEL_DEBUG,"%s: re-raising...",G_STRLOC);
420 * as it is dangerous to g_log() from sighandler.
425 static void sandbox_parent_own_orbit_dir_cleanup_init(void)
427 struct sandbox_parent_own_orbit_dir_cleanup_signal *sigstructp;
430 sigstructp=sandbox_parent_own_orbit_dir_cleanup_signals;
431 sigstructp<sandbox_parent_own_orbit_dir_cleanup_signals+G_N_ELEMENTS(sandbox_parent_own_orbit_dir_cleanup_signals);
433 sigstructp->sighandler_orig=signal(sigstructp->signum,sandbox_parent_own_orbit_dir_cleanup_sighandler);
434 if (sigstructp->sighandler_orig==SIG_IGN)
435 sigstructp->sighandler_orig=SIG_DFL;
439 static gchar *sandbox_parent_read_ior
440 (int Vfs_IOR_fd_read,gchar **child_chroot_pid_hashkey_dirp,CaptiveVfsParentObject *captive_vfs_parent_object)
445 gchar *ior,*child_chroot_pid_hashkey_dir;
450 /* Initialize /tmp/orbit-$username directory for linking IOR socket. */
451 errbool=corba_init("captive-sandbox-parent",&captive_corba_ev,&captive_corba_orb,&captive_corba_poa);
452 g_assert(errbool==TRUE);
454 /* FIXME: Security: Duplicate giop_tmpdir_init() here. */
455 if (!sandbox_parent_own_orbit_dir) {
456 /* FIXME: Make 'CAPTIVE_SANDBOX_CHROOT' configurable. */
457 sandbox_parent_own_orbit_dir=g_strdup_printf("%s/tmp/captive-orbit-%d",CAPTIVE_SANDBOX_CHROOT,getpid());
458 if (mkdir(sandbox_parent_own_orbit_dir,0700)) {
459 g_assert(errno==EEXIST);
460 sandbox_parent_own_orbit_dir_cleanup_init();
461 unlink_nonrecursive(sandbox_parent_own_orbit_dir);
462 if (mkdir(sandbox_parent_own_orbit_dir,0700))
463 g_assert_not_reached();
465 sandbox_parent_own_orbit_dir_cleanup_init();
466 linc_set_tmpdir(sandbox_parent_own_orbit_dir);
469 data=captive_rtl_file_read(Vfs_IOR_fd_read,&data_size); /* data_fd_read */
470 errint=close(Vfs_IOR_fd_read);
472 g_assert(data!=NULL);
473 g_assert(data_size>=1);
474 g_assert(data[data_size-1]=='\n');
476 hash=g_hash_table_new(g_str_hash,g_str_equal);
478 for (s=data;s<data+data_size;s=se+1) {
485 g_hash_table_insert(hash,s,sd+1);
487 g_assert(s==data+data_size);
489 if ((child_chroot_pid_hashkey_dir=g_hash_table_lookup(hash,"chroot_pid_hashkey_dir"))) {
490 const gchar *socketname,*socketpathname_src,*socketpathname_dest;
491 const gchar *chrooted_orbit_dir;
493 /* IOR contains the full pathname with the setuid username encoded. */
494 chrooted_orbit_dir=g_hash_table_lookup(hash,"chrooted_orbit_dir");
495 g_assert(chrooted_orbit_dir!=NULL);
496 captive_vfs_parent_object->corba_chrooted_orbit_dir=g_strdup(chrooted_orbit_dir);
497 /* 0700 as this directory will not be reused
498 * to commuicate with any other sandbox child.
500 if (mkdir(chrooted_orbit_dir,0700)) {
501 g_assert(errno==EEXIST);
504 socketname=g_hash_table_lookup(hash,"socketname");
505 g_assert(socketname!=NULL);
506 captive_vfs_parent_object->corba_socketname=g_strdup(socketname);
508 socketpathname_src=captive_printf_alloca("%s/%s/%s",child_chroot_pid_hashkey_dir,chrooted_orbit_dir,socketname);
509 socketpathname_dest=g_strdup_printf("%s/%s",chrooted_orbit_dir,socketname);
510 errint=link(socketpathname_src,socketpathname_dest);
512 g_error("link(\"%s\",\"%s\")=%d:%m",socketpathname_src,socketpathname_dest,errint);
514 if (child_chroot_pid_hashkey_dirp)
515 *child_chroot_pid_hashkey_dirp=g_strdup(child_chroot_pid_hashkey_dir);
517 ior=g_hash_table_lookup(hash,"ior");
522 g_hash_table_destroy(hash);
528 static xmlNode *options_module_captive_to_xml
529 (xmlNode *dest_xml_parent,const struct captive_options_module *src_options_module_captive)
531 g_return_val_if_fail(dest_xml_parent!=NULL,NULL);
532 g_return_val_if_fail(src_options_module_captive!=NULL,NULL);
534 { xmlNode *module=xmlNewTextChild(dest_xml_parent,NULL,"module",NULL);
535 const gchar *type_string="???"; /* Prevent: ... might be used uninitialized in this function */
536 const gchar *basename,*cgs;
538 basename=src_options_module_captive->pathname_utf8;
539 if ((cgs=strrchr(basename,'/')))
541 xmlNewProp(module,"basename",basename);
542 switch (src_options_module_captive->type) {
543 case CAPTIVE_OPTIONS_MODULE_TYPE_PE32:
545 xmlNewProp(module,"length",captive_printf_alloca("%lu",(unsigned long)src_options_module_captive->u.pe32.length));
546 xmlNewProp(module,"md5" ,src_options_module_captive->u.pe32.md5);
548 case CAPTIVE_OPTIONS_MODULE_TYPE_GMODULE:
549 type_string="gmodule";
551 default: g_assert_not_reached();
553 xmlNewProp(module,"type",type_string); /* AFTER the 'switch' to set 'type_string'! */
559 static void sandbox_parent_bug_doc_make(CaptiveVfsParentObject *captive_vfs_parent_object)
561 { xmlDoc *doc=xmlNewDoc("1.0");
562 captive_vfs_parent_object->corba_bug_doc=doc;
563 { xmlNode *bug=xmlNewDocNode(captive_vfs_parent_object->corba_bug_doc,NULL,"bug",NULL);
564 xmlDocSetRootElement(captive_vfs_parent_object->corba_bug_doc,bug);
565 captive_vfs_parent_object->corba_bug=bug;
566 { xmlNode *bug_captive=xmlNewTextChild(bug,NULL,"captive",NULL);
567 xmlNewProp(bug_captive,"version",VERSION);
569 { xmlNode *bug_filesystem=xmlNewTextChild(bug,NULL,"filesystem",NULL);
570 options_module_captive_to_xml(bug_filesystem,&CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.filesystem);
572 { xmlNode *bug_load_module=xmlNewTextChild(bug,NULL,"load_module",NULL);
574 struct captive_options_module *options_module;
575 GList *load_module_node;
577 for (load_moduleui=0,load_module_node=CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.load_module;
579 load_moduleui++,load_module_node=load_module_node->next) {
580 options_module=load_module_node->data;
581 options_module_captive_to_xml(bug_load_module,options_module);
584 { xmlNode *bug_action=xmlNewTextChild(bug,NULL,"action",NULL);
585 captive_vfs_parent_object->corba_bug_action=bug_action;
587 { xmlNode *bug_log=xmlNewTextChild(bug,NULL,"log",NULL);
588 captive_vfs_parent_object->corba_bug_log=bug_log;
595 static void sandbox_parent(const gchar *Vfs_IOR,const gchar *child_chroot_pid_hashkey_dir,CaptiveVfsParentObject *captive_vfs_parent_object)
597 Captive_Vfs Vfs_object;
598 Captive_GLogFunc GLogFunc_object;
599 Captive_CaptiveIOChannel CaptiveIOChannel_object;
600 Captive_CaptiveOptions options_corba;
601 guint load_module_length,load_moduleui;
602 struct captive_options_module *options_module;
603 GList *load_module_node;
604 const gchar *child_chroot_parent_own_orbit_socket,*child_chroot_parent_own_orbit_dir;
607 g_return_if_fail(Vfs_IOR!=NULL);
608 /* 'child_chroot_pid_hashkey_dir' may be NULL */
609 g_return_if_fail(CAPTIVE_VFS_PARENT_IS_OBJECT(captive_vfs_parent_object));
611 Vfs_object=CORBA_ORB_string_to_object(captive_corba_orb,Vfs_IOR,&captive_corba_ev);
612 g_assert(validate_CORBA_Environment(&captive_corba_ev));
614 /* Init 'GLogFunc_object' */
615 GLogFunc_object=impl_Captive_GLogFunc__create(captive_corba_poa,captive_vfs_parent_object,&captive_corba_ev);
616 g_assert(validate_CORBA_Environment(&captive_corba_ev));
618 /* Init 'CaptiveIOChannel_object' */
619 if (!captive_vfs_parent_object->corba_parent_giochanel_blind_source)
620 switch (CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.rwmode) {
621 case CAPTIVE_OPTION_RWMODE_RO:
622 case CAPTIVE_OPTION_RWMODE_RW:
623 captive_vfs_parent_object->corba_parent_giochanel_blind_source=CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.image_iochannel;
625 case CAPTIVE_OPTION_RWMODE_BLIND:
626 captive_vfs_parent_object->corba_parent_giochanel_blind_source=(GIOChannel *)captive_giochannel_blind_new(
627 CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.image_iochannel, /* giochannel_orig */
628 TRUE); /* writeable */
630 default: g_assert_not_reached();
632 if (!captive_vfs_parent_object->corba_parent_giochanel_blind)
633 captive_vfs_parent_object->corba_parent_giochanel_blind=(GIOChannel *)captive_giochannel_blind_new(
634 captive_vfs_parent_object->corba_parent_giochanel_blind_source, /* giochannel_orig */
635 (CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.rwmode!=CAPTIVE_OPTION_RWMODE_RO)); /* writeable */
636 CaptiveIOChannel_object=impl_Captive_CaptiveIOChannel__create(captive_corba_poa,
637 captive_vfs_parent_object->corba_parent_giochanel_blind,&captive_corba_ev);
638 g_assert(validate_CORBA_Environment(&captive_corba_ev));
640 /* Create the socket needed for 'sandbox_parent_own_orbit_socket' below
641 * by CORBA_ORB_object_to_string()->ORBit_marshal_object()->IOP_generate_profiles()->ORBit_ORB_start_servers...
645 GLogFunc_IOR=CORBA_ORB_object_to_string(captive_corba_orb,GLogFunc_object,&captive_corba_ev);
646 g_assert(validate_CORBA_Environment(&captive_corba_ev));
647 g_assert(GLogFunc_IOR!=NULL);
648 CORBA_free(GLogFunc_IOR);
651 if (sandbox_parent_own_orbit_dir && !sandbox_parent_own_orbit_socket) {
653 struct dirent *dirent;
655 dir=opendir(sandbox_parent_own_orbit_dir);
658 while (errno=0,(dirent=readdir(dir))) {
659 if (!strcmp(dirent->d_name,".") || !strcmp(dirent->d_name,".."))
661 g_assert(sandbox_parent_own_orbit_socket==NULL);
662 sandbox_parent_own_orbit_socket=g_strdup_printf("%s/%s",sandbox_parent_own_orbit_dir,dirent->d_name);
665 errint=closedir(dir);
667 g_assert(sandbox_parent_own_orbit_socket!=NULL);
670 if (child_chroot_pid_hashkey_dir) {
673 child_chroot_parent_own_orbit_dir=captive_printf_alloca("%s/%s",child_chroot_pid_hashkey_dir,sandbox_parent_own_orbit_dir);
674 s=(/* de-const */ gchar *)child_chroot_parent_own_orbit_dir;
679 if (*child_chroot_parent_own_orbit_dir) {
680 errint=mkdir(child_chroot_parent_own_orbit_dir,0777);
682 g_assert(errno==EEXIST);
684 /* chmod(2) it to prevent mode limitation by
685 * active ulimit(2) of being executed by mount(8).
687 errint=chmod(child_chroot_parent_own_orbit_dir,0777);
694 child_chroot_parent_own_orbit_socket=captive_printf_alloca("%s/%s",
695 child_chroot_pid_hashkey_dir,sandbox_parent_own_orbit_socket);
696 errint=link(sandbox_parent_own_orbit_socket,child_chroot_parent_own_orbit_socket);
698 /* chmod(2)s also our orig. one (!) but this one is protected by its 0777 directory. */
699 errint=chmod(child_chroot_parent_own_orbit_socket,0666);
703 options_corba.g_log_func=CORBA_Object_duplicate(GLogFunc_object,&captive_corba_ev);
704 g_assert(validate_CORBA_Environment(&captive_corba_ev));
706 options_module_captive_to_options_module_corba(&options_corba.filesystem,&CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.filesystem);
707 /* Prevent secondary captive_giochannel_blind inside of our sandbox child
708 * as we already have one captive_giochannel_blind in the parent.
710 options_corba.rwmode =(CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.rwmode == CAPTIVE_OPTION_RWMODE_BLIND ? CAPTIVE_OPTION_RWMODE_RW
711 : CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.rwmode);
712 options_corba.media =CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.media;
713 options_corba.debug_messages=CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.debug_messages;
715 options_corba.image_iochannel=CORBA_Object_duplicate(CaptiveIOChannel_object,&captive_corba_ev);
716 g_assert(validate_CORBA_Environment(&captive_corba_ev));
718 load_module_length=g_list_length(CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.load_module);
719 options_corba.load_module._maximum=load_module_length;
720 options_corba.load_module._length=load_module_length;
721 options_corba.load_module._buffer=Captive_CaptiveOptionsModuleList_allocbuf(options_corba.load_module._maximum);
722 options_corba.load_module._release=TRUE;
723 for (load_moduleui=0,load_module_node=CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.load_module;
725 load_moduleui++,load_module_node=load_module_node->next) {
726 options_module=load_module_node->data;
727 options_module_captive_to_options_module_corba(options_corba.load_module._buffer+load_moduleui,options_module);
730 Captive_Vfs_init(Vfs_object,&options_corba,&captive_corba_ev);
731 g_assert(validate_CORBA_Environment(&captive_corba_ev));
733 Captive_CaptiveOptions__freekids(&options_corba,
734 NULL); /* d; unused */
736 captive_vfs_parent_object->corba_Vfs_object=Vfs_object;
737 captive_vfs_parent_object->corba_GLogFunc_object=GLogFunc_object;
738 captive_vfs_parent_object->corba_CaptiveIOChannel_object=CaptiveIOChannel_object;
740 if (CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.bug_pathname)
741 sandbox_parent_bug_doc_make(captive_vfs_parent_object);
744 static void fd_shiftup(int *fdp)
746 g_return_if_fail(fdp!=NULL);
748 while (*fdp<=2 /* STDERR */) {
754 void captive_sandbox_fd_closeup(int fd_first_to_delete)
759 struct dirent *dirent;
761 dir=opendir("/proc/self/fd/");
762 g_return_if_fail(dir!=NULL);
764 g_return_if_fail(dir_fd!=-1);
766 while (errno=0,(dirent=readdir(dir))) {
771 || !strcmp(dirent->d_name,".")
772 || !strcmp(dirent->d_name,".."))
774 dirent_fd=strtol(dirent->d_name,&endptr,10 /* base */);
775 g_assert(dirent_fd>=0 && (!endptr || !*endptr));
776 if (dirent_fd<fd_first_to_delete || dirent_fd==dir_fd)
779 errint=close(dirent_fd);
782 errint=close(dirent_fd);
783 g_assert(errint==-1); g_assert(errno==EBADF);
785 g_return_if_fail(errno==0); /* check for EOF */
787 errint=closedir(dir);
788 g_return_if_fail(errint==0);
790 close(dir_fd); g_assert(errno==EBADF); /* just a bit of paranoia; it should be already closed by closedir() */
793 gboolean captive_sandbox_spawn(CaptiveVfsParentObject *captive_vfs_parent_object)
795 /* Vfs_IOR_fds[0] for reading by sandbox_parent() - client,
796 * Vfs_IOR_fds[1] for writing by sandbox_child() - server
798 int Vfs_IOR_fds[2],parentheart_fds[2];
802 g_return_val_if_fail(CAPTIVE_VFS_PARENT_IS_OBJECT(captive_vfs_parent_object),FALSE);
804 errint=pipe(Vfs_IOR_fds);
805 g_return_val_if_fail(errint==0,FALSE);
806 errint=pipe(parentheart_fds);
807 g_return_val_if_fail(errint==0,FALSE);
809 /* Currently never called anywhere:
810 * errbool=corba_shutdown(&captive_corba_ev,&captive_corba_orb,&captive_corba_poa);
811 * g_assert(errbool==TRUE);
814 if (CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_ior) {
815 g_assert(CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_argv==NULL);
817 errbool=corba_init("captive-sandbox-parent",&captive_corba_ev,&captive_corba_orb,&captive_corba_poa);
818 g_assert(errbool==TRUE);
820 captive_vfs_parent_object->corba_parentheart_fds_1=-1;
821 captive_vfs_parent_object->corba_child_pid=-1;
823 CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_ior, /* Vfs_IOR */
824 NULL, /* child_chroot_pid_hashkey_dir */
825 captive_vfs_parent_object); /* captive_vfs_parent_object */
829 g_assert(CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_argv!=NULL);
830 switch ((captive_vfs_parent_object->corba_child_pid=fork())) {
832 g_return_val_if_reached(FALSE);
834 case 0: { /* child */
836 errint=close(Vfs_IOR_fds[0]); /* close Vfs_IOR_fd_read */
837 g_return_val_if_fail(errint==0,FALSE);
838 errint=close(parentheart_fds[1]); /* close parentheart_fd_write */
839 g_return_val_if_fail(errint==0,FALSE);
841 fd_shiftup(Vfs_IOR_fds+1); /* Vfs_IOR_fd_write */
842 fd_shiftup(parentheart_fds+0); /* parentheart_fd_read */
843 errint=dup2(Vfs_IOR_fds[1],1 /* STDOUT */); /* Vfs_IOR_fd_write */
844 g_return_val_if_fail(errint==1 /* STDOUT */,FALSE);
845 errint=dup2(parentheart_fds[0],0 /* STDIN */); /* parentheart_fd_read */
846 g_return_val_if_fail(errint==0 /* STDIN */,FALSE);
848 captive_sandbox_fd_closeup(2 /* STDERR */ +1);
850 execv(CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_argv[0],
851 /* re-const */ (char * const *)CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_argv);
852 g_return_val_if_reached(FALSE);
855 default: { /* parent */
857 gchar *child_chroot_pid_hashkey_dir;
859 errint=close(Vfs_IOR_fds[1]); /* close Vfs_IOR_fd_write */
860 g_return_val_if_fail(errint==0,FALSE);
861 errint=close(parentheart_fds[0]); /* close parentheart_fd_read */
862 g_return_val_if_fail(errint==0,FALSE);
863 errint=fcntl(parentheart_fds[1],F_SETFD,FD_CLOEXEC);
864 /* This fcntl(2) may not be enough - some fork(2) may duplicate this
865 * write descriptor and even if we do some process finish the child
866 * may remain alone connected with some unknown fork(2)er from us.
867 * Currently I am not aware such case would occur.
869 g_return_val_if_fail(errint==0,FALSE);
870 captive_vfs_parent_object->corba_parentheart_fds_1=parentheart_fds[1];
872 Vfs_IOR=sandbox_parent_read_ior(
873 Vfs_IOR_fds[0], /* Vfs_IOR_fd_read */
874 &child_chroot_pid_hashkey_dir,
875 captive_vfs_parent_object);
878 Vfs_IOR, /* Vfs_IOR */
879 child_chroot_pid_hashkey_dir, /* child_chroot_pid_hashkey_dir */
880 captive_vfs_parent_object); /* captive_vfs_parent_object */
883 g_free(child_chroot_pid_hashkey_dir);
885 /* 'parentheart_fds[1]' - parentheart_fd_write - is left open here */
890 g_return_val_if_reached(FALSE);
894 GnomeVFSResult captive_sandbox_parent_return_from_CORBA_Environment
895 (CORBA_Environment *evp,CaptiveVfsParentObject *captive_vfs_parent_object)
899 if (evp->_major==CORBA_NO_EXCEPTION)
902 /* If !CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_argv it is CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_ior
903 * where we cannot do any restart anyway.
905 if (captive_vfs_parent_object && CAPTIVE_VFS_OBJECT(captive_vfs_parent_object)->options.sandbox_server_argv
906 && (evp->_major==CORBA_SYSTEM_EXCEPTION && !strcmp(ex_CORBA_COMM_FAILURE,CORBA_exception_id(evp)))) {
907 r=GNOME_VFS_ERROR_SERVICE_NOT_AVAILABLE;
908 if (captive_vfs_parent_object->corba_Vfs_object!=CORBA_OBJECT_NIL)
909 captive_vfs_parent_object_aborted(captive_vfs_parent_object); /* errors ignored */
911 else if (evp->_major==CORBA_USER_EXCEPTION && !strcmp(ex_Captive_GnomeVFSResultException,CORBA_exception_id(evp))) {
912 r=((Captive_GnomeVFSResultException *)CORBA_exception_value(evp))->gnome_vfs_result;
913 g_assert(r!=GNOME_VFS_ERROR_SERVICE_NOT_AVAILABLE); /* code reserved for sandbox restarts */
916 r=GNOME_VFS_ERROR_GENERIC;
917 g_warning(_("CORBA Exception occured: id=\"%s\", value=%p"),
918 CORBA_exception_id(evp),CORBA_exception_value(evp));
920 CORBA_exception_free(evp);
926 void captive_sandbox_child_GnomeVFSResultException_throw(CORBA_Environment *evp,GnomeVFSResult errvfsresult)
928 Captive_GnomeVFSResultException *gnome_vfs_result_exception;
930 g_return_if_fail(evp!=NULL);
932 gnome_vfs_result_exception=Captive_GnomeVFSResultException__alloc();
933 gnome_vfs_result_exception->gnome_vfs_result=errvfsresult;
934 CORBA_exception_set(evp,CORBA_USER_EXCEPTION,ex_Captive_GnomeVFSResultException,gnome_vfs_result_exception);